Tire.



M. C. OVERMAN,

TIRE. APPLICATION FILED JUNE 21. I9I3 Patented July 4, 1916:

2 SHEETS-SHEET l.

M. C. OVERMAN.

TIRE.

APPLICATION FILED JUNEZI, 1913.

1 .1 89,780. Patented July 4, 1916.

2 SHEETS-SHEET 2- WITNESSES:

- sectional view of the tire MAX CYRUS OVERMAN, OF NEW YORK, N. Y.

TIRE.

Specification of Letters Patent.

Patented July 4, 1916.

Application filed June 21, 1913. Serial No. 774,955.

In the drawings, Figure 1 is a fragment in side eleuation of a rubber vehicle tire em-' bodying my in'iprovements; Fig. :2 is a cross of Fig. 1; Fig. 3 is a plan view ofthe tread of: the same tire; Fig. is a perspective view on enlarged scale compared to the previous figures, of one of the cores or inserts used in the manufacture of-thistire for forming one of the transverse spaces with conjoined part of the longitudinal space together with the pebbleejecting projectitms.v

T will now describe the specific devices of the drawings, reserving it to the claims to point out the'novel features and to define the scope of the invention, it being understood that the claims will be given the due range of equivalents to. which they may be entitled in view. of the art.

.lt willu be unnecessary to describe'the wheel folly and. tire securing devices since these are now well known and form no part of my present improvements.

The tire shown.is of the cushion type and in the main is the same as that already inwn by i'rfe in other Letters Patent, and

ha used this tire 4 the two main improvements coninvention. .These imgreatly deepmy present are-(l st)- I have 1 trz-msverse tread-grooves so. that now have portions 10 which extend up through. the central portions of the walls 5 adjacent the V-shaped opening. l. have let into the sides of the individual nose sections triangular openings opposed base to base and separated by a longitudinally extending web.

7 Describing the illustrated tire and the aforesaid improvements more in detail, its cross section (see Fig. 2) is generally trapezoidal and it has a longitudinal opening 1 to show the applica" diate the extending through or around it, the cross section of which is V-shapecl.

2-2 are the base portions of the tire divlded from each other by an upright longi tudmal space shown occupied in Fig. 2 by the stem 3 of one of the tire-securing or clamp ng devices 4: of which there are a plurality disposed around the wheel.

5-5 are thethick substantially straight, steeply converging load-supporting side walls adyacent the V-shaped opening 1 below the wheel flanges 6.

7 is the deep load-supporting nose portion of the tire extending across the lower ends of the side wallsv5 '5 and across the apex of the V-shaped opening. (The bottom of the nose has a wide ground contact under the side walls 5. The nose is deeply divided into two laterally flexible halves under these s de walls 5 by a deep central longitudinal tread-weakening 8 which may be regarded as being a groove or trough which has been bridged at intervals by transverse tread webs 9. Further, each half of the nose is made longitudinally or radial transverse grooves or spaces 10 extending from the sides of the nose or tread into the longitudinal groove 8. These spaces 10 in the two halves of the nose alternate with each other as best shown in the plan view Fig. 1; and at' 10" extend deeply up through the central portions of the side walls 5. These spaces 10 open through the sides of the tire only toward thetread and do not do so at their upper ends 10. This is shownin Figs. 1 and 2 where the tops of the places where the spaces 10 open through the sides of the .tire are designated 10 The result or the foregoing construction is that the deep nose portion is divided into deeply laterally flexible halves, and these in turn into deeply longitudinally flexible nose sections in continuity of the corresponding flexibilities of the side walls 5; and these nose sections together with said walls firmly support the load; and the extended tops 10 of the spaces 10, by coring out the walls 5, give them augmented flexibilities in graded continuity with the flexi bilities of the nose sections, being intermereater flexibility ofsaid sections and the elatively slight flexibility of the base por ons 2-2 of the tire. Further, this coring out of the side walls 5 is important for other reasons, since, for instance, it inflexible by deep upright creases their resiliency without lessening their lateral or longitudinal stabilitv r ability to stand up under work without bending collapse.

Into the outer side section 7*, I form an opening 11 extending inwardly to a greater or less extent through the section, said opening being triangular, or

substantially or cross section. On .top, of this and disposed base to base thereto separated by a longitudinally extending web 12, I form another similar opening 11. The effect is to augment considerably the resiliency of the nose section whiYe still maintaining an all sufficient lateral and longitudinal stability.

The use of two opposed small triangular openings is advantageous over using onl one of the combined cross section of the other two, because in this particular location the larger opening would give less stability. On the other hand, the ends of the webs 12 and the sides of the small opposed triangles are backed up by the adjacent thick masses of rubber (see Fig. 1) and are very stable.

l urther, it will be noted thatthe augmented resiliency of the tire as a whole, due to these openings, makes up for any loss of resiliency due to the wearing down of the nose so that even a greatly Worn tire will. still be sufli ciently resilient for good riding.

My present improvements are valuable especially for use in connection with a tire made of relatively soft flexible compound as distinguished from a stiflly flexible compound such as that commonly used for the treads of ordinary pneumatic tires.

1313 are a sf ies of nipples or projections located in the lateral and longitudinal grooves or spaces so as to extend integrally from the bottom and sides thereof, and they serve to eject pebbles and, in fact, prevent the tire from picking up these or other objects.

The expressions in the description and claims directed to the up and down relationship of the parts of the tire'refer to a section of the tire positioned as if in ground contact as in Fig. 2.

What I claim is:

. 1. A tire comprising a deep nose portion with a deep longitudinally extending central tread-weakening and deep transverse tread-'weakenings leading from the sides of the nose to said central weakening, thereby forming the nose into deep laterally and longitudinally flexible load-supporting sections, said sections each having a substantially triangular cross-sectionedhole in its side.

2. A tire comprising a deep nose portion with a deep longitudinally extending central tread-weakening and deep transverse tread- Weakenings leading from the sides of the nose to said central weakening, thereby form ing the 'nose into deep laterally and longiportion of each trea'd equivalently triangular, in

the nose to said central directed toward the 8. A tire having a deep nose portion dimaavao tudinally flexible ioad-supportin sections,

said sections each having two substantially triangularcross-sectioned holes in its side,

opposed base to base, where they are separated by a longitudinally extending web.

3. A tire comprising a deep nose portion with a deep longitudinally extending central tread-weakening and, deep transversetread-weakenings leading from the sides of weakening, thereby forming the nose into deep laterally and longitudinally flexible load-supporting sections, said sections each having two substantially triangular cross-sectioned holes in its side, opposed base to base, where they are separated by a longitudinally extending web, said longitudinal webs being located-in or about the zone of'the tops ofthe transverse weakenings where they open through the sides of the nose.

4. A tire comprising a deep nose portion with a deep longitudinally extending central tread-weakeningand deep transverse treadweakenings leading from the sides of the nose to said, central weakening, thereby forming the nose into deep laterally and longitudinally flexible load-supporting sections, said sections each having two substantially triangular cross-sectioned holes in its'side, opposed base to base, where they are sepa rated by a longitudinally extending web, the transverse tread-weakenings extending up into the. tire and thence downwardly and out at the sides of the nose, the aforesaid longitudinal Webs being located in or about the .100 weakening zone of the tops of said transverse weakenings where they open through the sides of the nose.

5. A tire. comprising a deep nose'portion with a deep longitudinally extending central dinally flexible load-supporting sections, said sections each having a substantially trian gular cross-sectioned hole in itsside of substantially uniform cross section throughout its length.

6. A tire comprising a deep nose portion with a deep longitudinally extending ceI1- tral tread-weakening and deep transverse tread-weakenings leading from the sides of the nose. to said central weakening, thereby forming-the nose into deep laterally and longitudinally flexible load-supportin sections, said sections each having a mans versely extending hole let into its side.-

7. A tire having a deep nose portion divided from the and longitudinally flexible sections, each having a substantially triangular cross-sectioned hole formed in its side with its apex tread.

tread into deep laterally deeplyv as to core vided from the tread into deep laterally and longitudinally flexible sections, each having two substantially triangular cross-sectioned holes in its side, opopsed base to base, where they are separated by a longitudinally extending web.

9. A hollow cushion tire comprising the combination of flange-free walls containing the hollow of the tire between them and supporting the load by their vertical compression with accompanying thickening but without bending'collapse, and a wide, deep, substantial nose portion extending horizontally across the hollow of the tire in firm supporting ground-contact under said walls, said nose being longitudinally deeply weakened providing laterally flexible halves under said walls, versely deeply weakened making said halves longitudinally flexible, said halves also, like the walls, supporting the load by their vertical compression with accompanying thickening but without bending collapse, said transverse weakenings extending up so out the middle portions of the walls adjacent the hollow of the tire.

10. A hollow cushion tire comprising the combination of flange-free walls containing the hollow of the tire between them and supporting the load by theirvertical compression with accompanying thickening but without bending collapse, and a wide, deep, substantial nose portion extending horizontally across the hollow of the tire in firm supporting ground-contact under said walls, said nose being longitudinally deeply weakened providing laterally flexible halves under said walls, and each half being transversely deeply weakened making said halves longitudinally flexible, said halves also, like the walls, supporting the load by their vertical compression with accompanying thickening but without bending collapse, said transverse weakenings extending up so deeply as to core out the middle portions of the walls adjacent the hollow of the tire, the sides of the tire between the aforesaid transverse openings having let into them. substa nti ally triangular cross-sectioned holes.-

and each half being trans-' 11. A hollow cushion tire comprising the combination of flange-free walls containing the hollow of the tire between them and supporting the load by their vertical compression with accompanying thickening but without bending collapse, and a wide, deep, substantial noseportion extending horizontally across the hollow of the tire in firm supporting round-contact under said walls, said nose being longitudinally deeply weakened providing laterally flexible halves under said walls, and each half being transversely deeply weakened making said halves longitudinally flexible, said halves also, like the walls, supporting the load by their vertical compression with accompanying thickening but without bending collapse, the sides of said tire between the aforesaid transverse weakenings having paired substantially triangular cross-sectioned holes formed therein, each pair being opposed base to base where they are separated by a longitudinally extending web.

12. A hollow cushion tire comprising the combination of flange-free walls containing the hollow of the tire between them and supporting the load by their vertical compression with accompanying thickening but without bending collapse, and a Wide, deep, substantial nose portion extending horizontally across the hollow v supporting ground-contact under said walls, said nose being longitudinally deeply weakened providing laterally flexible halves under said walls, and each half being transversely deeply weakened making said halves longitudinally flexible, said halves also, like the walls, supporting the load by their vertical compression with accompanying thickening but without bending collapse, the sides of said tire between the aforesaid transverse weakenings having holes which extend inwardly therethrough.

In testin' 'ony whereof, I affix my signature in presence of two witnesses.

MAX CYRUS OVERMAN.

\Vitnesses E; \V. Scimnn, Jr., Jnssin BAUMANN.

of the tire in firm Correction in Letters PatentNot ,1 89,730.

' the said Letters Patent It is he reby ceytified that in Letters Patent upen the applicatidn of Mg): Cyrue Overmaxi,

es follows:

. [SEALJ Page 2, line 101', claim 1, strike out No. 1,189,730, granted Jul 4, 191e,

Tiresf an error appeai's in the printed specification requiring correction the Wind weakening; and that should be read with this eerreetion therein that the same may conform to the teem-1 of; the case in the Patent Ofiice.

Signed and eee led this 3d 555 a October, A. 1);, 191s.

FLW; H. 0LA'Y, 1 Aching Commissioner of Pateme.

of New York, N. Y., for an improfie I 

